JPH02120547U - - Google Patents
Info
- Publication number
- JPH02120547U JPH02120547U JP2994989U JP2994989U JPH02120547U JP H02120547 U JPH02120547 U JP H02120547U JP 2994989 U JP2994989 U JP 2994989U JP 2994989 U JP2994989 U JP 2994989U JP H02120547 U JPH02120547 U JP H02120547U
- Authority
- JP
- Japan
- Prior art keywords
- relief valve
- valve
- operating
- hydraulic
- driver
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000010586 diagram Methods 0.000 description 5
Landscapes
- Operation Control Of Excavators (AREA)
Description
第１図は本考案実施例にもとづく油圧式掘削機
の油圧回路図、第２図は本考案実施例にもとづく
油圧式掘削機、油圧回路、各装置の配置図、第３
図は従来技術にもとづく油圧式掘削機の油圧回路
図、第４図ａは従来技術にもとづく直動リンク機
構による切換え弁操作方式図、第４図ｂは従来技
術にもとづくパイロツト油圧による切換え弁操作
方式図。
１……油圧ポンプ、２……操作弁、４……油圧
ポンプ、５……操作弁、７……メインリリーフ弁
、８……メインリリーフ弁、９……メインリリー
フ弁ブロツク、１２……ポートリリーフ弁、１３
……ポートリリーフ弁、１４……ポートリリーフ
弁、１５……ポートリリーフ弁、１８……ポート
リリーフ弁、１９……ポートリリーフ弁、２０…
…ポートリリーフ弁、２１……ポートリリーフ弁
、２２……ポートリリーフ弁ブロツク、２３……
操作レバー、２４……操作レバー、２５……操作
レバー、２７……運転室。
Fig. 1 is a hydraulic circuit diagram of a hydraulic excavator based on an embodiment of the present invention, Fig. 2 is a layout diagram of a hydraulic excavator, hydraulic circuit, and each device based on an embodiment of the present invention.
Figure 4 is a hydraulic circuit diagram of a hydraulic excavator based on the conventional technology, Figure 4a is a diagram of the switching valve operating system using a direct link mechanism based on the prior art, and Figure 4b is a switching valve operating system using pilot hydraulic pressure based on the prior art. Scheme diagram. 1... Hydraulic pump, 2... Operating valve, 4... Hydraulic pump, 5... Operating valve, 7... Main relief valve, 8... Main relief valve, 9... Main relief valve block, 12... Port Relief valve, 13
... Port relief valve, 14 ... Port relief valve, 15 ... Port relief valve, 18 ... Port relief valve, 19 ... Port relief valve, 20 ...
... Port relief valve, 21 ... Port relief valve, 22 ... Port relief valve block, 23 ...
Operating lever, 24... Operating lever, 25... Operating lever, 27... Driver's cab.
Claims (1)
を、操作弁とアクチユエータの間にポートリリー
フ弁を有し、操作弁の切換えをリンク機構にて行
なう油圧回路装置において、メインリリーフ弁と
ポートリリーフ弁を非運転室に設けると共に、運
転席の前方あるいは側方近傍に操作レバーにより
スプールを切り換える操作弁を配設したことを特
徴とする油圧式掘削機の油圧回路装置。 In a hydraulic circuit device that has a main relief valve between a hydraulic pump and an operating valve, a port relief valve between the operating valve and an actuator, and switches between operating valves using a link mechanism, the main relief valve and the port relief valve 1. A hydraulic circuit device for a hydraulic excavator, characterized in that a control valve is provided in a non-driver's cab, and a control valve for switching the spool by a control lever is arranged in front of or near the side of the driver's seat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2994989U JPH02120547U (en) | 1989-03-15 | 1989-03-15 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2994989U JPH02120547U (en) | 1989-03-15 | 1989-03-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02120547U true JPH02120547U (en) | 1990-09-28 |
Family
ID=31254574
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2994989U Pending JPH02120547U (en) | 1989-03-15 | 1989-03-15 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02120547U (en) |
-
1989
- 1989-03-15 JP JP2994989U patent/JPH02120547U/ja active Pending
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